For the reader tarot cards are a person tool, and for an avid reader after they have been using them for so long they form a personal bond and coonection with their cards. Over time the reader will have a relationship so to speak with his or her cards and develop instincts, feelings, and habits with their deck. I have seen a lot of readers do weird things with their cards, but at the same time I understand as a reader myself. Each person will have their own way of handling their cards, have a certain way of performing a reading and so on.
As far as the reverersed cards are considerded some people believe that such a card represents the opposite meaning of that which when the card is face up. Like someone already said some don't pay it any regard. Some people see reveresed cards as omens or signs and so on. Really it is up to you to feel the cards and interpret them as you see fit. I personally don't play much into the meanings and definitions that many decks come accompanied with such as their booklets or manuals. Because really.. there is no manual for divination, it's not a set in stone process.
I suggest you read one of my earlier posts on explaining divination for further information, not to mention if you take the time and have the patience there is a lot of actually decent info in the forums, and you can always google or do research.
Blessings and I hope this helps,